The core only supports up to 32 slaves, and the chipselect function
expects the same.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.riba...@gmail.com>
---
drivers/spi/spi-xilinx.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 026f4c5..134d8cd 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -22,6 +22,8 @@
#include <linux/spi/xilinx_spi.h>
#include <linux/io.h>
+#define MAX_CS 32
+
#define XILINX_SPI_NAME "xilinx_spi"
/* Register definitions as per "OPB Serial Peripheral Interface (SPI) (v1.00e)
@@ -340,6 +342,11 @@ static int xilinx_spi_probe(struct platform_device *pdev)
return -EINVAL;
}
+ if (num_cs > MAX_CS) {
+ dev_err(&pdev->dev, "Invalid number of spi slaves\n");
+ return -EINVAL;
+ }
+
master = spi_alloc_master(&pdev->dev, sizeof(struct xilinx_spi));
if (!master)
return -ENODEV;
--
2.1.4
--
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